Commit | Line | Data |
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254f965c BW |
1 | /* |
2 | * Copyright © 2011-2012 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Ben Widawsky <ben@bwidawsk.net> | |
25 | * | |
26 | */ | |
27 | ||
28 | /* | |
29 | * This file implements HW context support. On gen5+ a HW context consists of an | |
30 | * opaque GPU object which is referenced at times of context saves and restores. | |
31 | * With RC6 enabled, the context is also referenced as the GPU enters and exists | |
32 | * from RC6 (GPU has it's own internal power context, except on gen5). Though | |
33 | * something like a context does exist for the media ring, the code only | |
34 | * supports contexts for the render ring. | |
35 | * | |
36 | * In software, there is a distinction between contexts created by the user, | |
37 | * and the default HW context. The default HW context is used by GPU clients | |
38 | * that do not request setup of their own hardware context. The default | |
39 | * context's state is never restored to help prevent programming errors. This | |
40 | * would happen if a client ran and piggy-backed off another clients GPU state. | |
41 | * The default context only exists to give the GPU some offset to load as the | |
42 | * current to invoke a save of the context we actually care about. In fact, the | |
43 | * code could likely be constructed, albeit in a more complicated fashion, to | |
44 | * never use the default context, though that limits the driver's ability to | |
45 | * swap out, and/or destroy other contexts. | |
46 | * | |
47 | * All other contexts are created as a request by the GPU client. These contexts | |
48 | * store GPU state, and thus allow GPU clients to not re-emit state (and | |
49 | * potentially query certain state) at any time. The kernel driver makes | |
50 | * certain that the appropriate commands are inserted. | |
51 | * | |
52 | * The context life cycle is semi-complicated in that context BOs may live | |
53 | * longer than the context itself because of the way the hardware, and object | |
54 | * tracking works. Below is a very crude representation of the state machine | |
55 | * describing the context life. | |
56 | * refcount pincount active | |
57 | * S0: initial state 0 0 0 | |
58 | * S1: context created 1 0 0 | |
59 | * S2: context is currently running 2 1 X | |
60 | * S3: GPU referenced, but not current 2 0 1 | |
61 | * S4: context is current, but destroyed 1 1 0 | |
62 | * S5: like S3, but destroyed 1 0 1 | |
63 | * | |
64 | * The most common (but not all) transitions: | |
65 | * S0->S1: client creates a context | |
66 | * S1->S2: client submits execbuf with context | |
67 | * S2->S3: other clients submits execbuf with context | |
68 | * S3->S1: context object was retired | |
69 | * S3->S2: clients submits another execbuf | |
70 | * S2->S4: context destroy called with current context | |
71 | * S3->S5->S0: destroy path | |
72 | * S4->S5->S0: destroy path on current context | |
73 | * | |
74 | * There are two confusing terms used above: | |
75 | * The "current context" means the context which is currently running on the | |
508842a0 | 76 | * GPU. The GPU has loaded its state already and has stored away the gtt |
254f965c BW |
77 | * offset of the BO. The GPU is not actively referencing the data at this |
78 | * offset, but it will on the next context switch. The only way to avoid this | |
79 | * is to do a GPU reset. | |
80 | * | |
81 | * An "active context' is one which was previously the "current context" and is | |
82 | * on the active list waiting for the next context switch to occur. Until this | |
83 | * happens, the object must remain at the same gtt offset. It is therefore | |
84 | * possible to destroy a context, but it is still active. | |
85 | * | |
86 | */ | |
87 | ||
760285e7 DH |
88 | #include <drm/drmP.h> |
89 | #include <drm/i915_drm.h> | |
254f965c | 90 | #include "i915_drv.h" |
198c974d | 91 | #include "i915_trace.h" |
254f965c | 92 | |
b2e862d0 CW |
93 | #define ALL_L3_SLICES(dev) (1 << NUM_L3_SLICES(dev)) - 1 |
94 | ||
40521054 BW |
95 | /* This is a HW constraint. The value below is the largest known requirement |
96 | * I've seen in a spec to date, and that was a workaround for a non-shipping | |
97 | * part. It should be safe to decrease this, but it's more future proof as is. | |
98 | */ | |
b731d33d BW |
99 | #define GEN6_CONTEXT_ALIGN (64<<10) |
100 | #define GEN7_CONTEXT_ALIGN 4096 | |
40521054 | 101 | |
c033666a | 102 | static size_t get_context_alignment(struct drm_i915_private *dev_priv) |
b731d33d | 103 | { |
c033666a | 104 | if (IS_GEN6(dev_priv)) |
b731d33d BW |
105 | return GEN6_CONTEXT_ALIGN; |
106 | ||
107 | return GEN7_CONTEXT_ALIGN; | |
108 | } | |
109 | ||
c033666a | 110 | static int get_context_size(struct drm_i915_private *dev_priv) |
254f965c | 111 | { |
254f965c BW |
112 | int ret; |
113 | u32 reg; | |
114 | ||
c033666a | 115 | switch (INTEL_GEN(dev_priv)) { |
254f965c BW |
116 | case 6: |
117 | reg = I915_READ(CXT_SIZE); | |
118 | ret = GEN6_CXT_TOTAL_SIZE(reg) * 64; | |
119 | break; | |
120 | case 7: | |
4f91dd6f | 121 | reg = I915_READ(GEN7_CXT_SIZE); |
c033666a | 122 | if (IS_HASWELL(dev_priv)) |
a0de80a0 | 123 | ret = HSW_CXT_TOTAL_SIZE; |
2e4291e0 BW |
124 | else |
125 | ret = GEN7_CXT_TOTAL_SIZE(reg) * 64; | |
254f965c | 126 | break; |
8897644a BW |
127 | case 8: |
128 | ret = GEN8_CXT_TOTAL_SIZE; | |
129 | break; | |
254f965c BW |
130 | default: |
131 | BUG(); | |
132 | } | |
133 | ||
134 | return ret; | |
135 | } | |
136 | ||
e2efd130 | 137 | static void i915_gem_context_clean(struct i915_gem_context *ctx) |
e9f24d5f TU |
138 | { |
139 | struct i915_hw_ppgtt *ppgtt = ctx->ppgtt; | |
140 | struct i915_vma *vma, *next; | |
141 | ||
61fb5881 | 142 | if (!ppgtt) |
e9f24d5f TU |
143 | return; |
144 | ||
e9f24d5f | 145 | list_for_each_entry_safe(vma, next, &ppgtt->base.inactive_list, |
1c7f4bca | 146 | vm_link) { |
e9f24d5f TU |
147 | if (WARN_ON(__i915_vma_unbind_no_wait(vma))) |
148 | break; | |
149 | } | |
150 | } | |
151 | ||
dce3271b | 152 | void i915_gem_context_free(struct kref *ctx_ref) |
40521054 | 153 | { |
e2efd130 | 154 | struct i915_gem_context *ctx = container_of(ctx_ref, typeof(*ctx), ref); |
40521054 | 155 | |
499f2697 | 156 | lockdep_assert_held(&ctx->i915->dev->struct_mutex); |
198c974d DCS |
157 | trace_i915_context_free(ctx); |
158 | ||
ae6c4806 | 159 | if (i915.enable_execlists) |
ede7d42b | 160 | intel_lr_context_free(ctx); |
c7c48dfd | 161 | |
e9f24d5f TU |
162 | /* |
163 | * This context is going away and we need to remove all VMAs still | |
164 | * around. This is to handle imported shared objects for which | |
165 | * destructor did not run when their handles were closed. | |
166 | */ | |
167 | i915_gem_context_clean(ctx); | |
168 | ||
ae6c4806 DV |
169 | i915_ppgtt_put(ctx->ppgtt); |
170 | ||
2f295791 BW |
171 | if (ctx->legacy_hw_ctx.rcs_state) |
172 | drm_gem_object_unreference(&ctx->legacy_hw_ctx.rcs_state->base); | |
c7c48dfd | 173 | list_del(&ctx->link); |
5d1808ec CW |
174 | |
175 | ida_simple_remove(&ctx->i915->context_hw_ida, ctx->hw_id); | |
40521054 BW |
176 | kfree(ctx); |
177 | } | |
178 | ||
8c857917 | 179 | struct drm_i915_gem_object * |
aa0c13da OM |
180 | i915_gem_alloc_context_obj(struct drm_device *dev, size_t size) |
181 | { | |
182 | struct drm_i915_gem_object *obj; | |
183 | int ret; | |
184 | ||
499f2697 CW |
185 | lockdep_assert_held(&dev->struct_mutex); |
186 | ||
d37cd8a8 | 187 | obj = i915_gem_object_create(dev, size); |
fe3db79b CW |
188 | if (IS_ERR(obj)) |
189 | return obj; | |
aa0c13da OM |
190 | |
191 | /* | |
192 | * Try to make the context utilize L3 as well as LLC. | |
193 | * | |
194 | * On VLV we don't have L3 controls in the PTEs so we | |
195 | * shouldn't touch the cache level, especially as that | |
196 | * would make the object snooped which might have a | |
197 | * negative performance impact. | |
4d3e904c WB |
198 | * |
199 | * Snooping is required on non-llc platforms in execlist | |
200 | * mode, but since all GGTT accesses use PAT entry 0 we | |
201 | * get snooping anyway regardless of cache_level. | |
202 | * | |
203 | * This is only applicable for Ivy Bridge devices since | |
204 | * later platforms don't have L3 control bits in the PTE. | |
aa0c13da | 205 | */ |
4d3e904c | 206 | if (IS_IVYBRIDGE(dev)) { |
aa0c13da OM |
207 | ret = i915_gem_object_set_cache_level(obj, I915_CACHE_L3_LLC); |
208 | /* Failure shouldn't ever happen this early */ | |
209 | if (WARN_ON(ret)) { | |
210 | drm_gem_object_unreference(&obj->base); | |
211 | return ERR_PTR(ret); | |
212 | } | |
213 | } | |
214 | ||
215 | return obj; | |
216 | } | |
217 | ||
5d1808ec CW |
218 | static int assign_hw_id(struct drm_i915_private *dev_priv, unsigned *out) |
219 | { | |
220 | int ret; | |
221 | ||
222 | ret = ida_simple_get(&dev_priv->context_hw_ida, | |
223 | 0, MAX_CONTEXT_HW_ID, GFP_KERNEL); | |
224 | if (ret < 0) { | |
225 | /* Contexts are only released when no longer active. | |
226 | * Flush any pending retires to hopefully release some | |
227 | * stale contexts and try again. | |
228 | */ | |
c033666a | 229 | i915_gem_retire_requests(dev_priv); |
5d1808ec CW |
230 | ret = ida_simple_get(&dev_priv->context_hw_ida, |
231 | 0, MAX_CONTEXT_HW_ID, GFP_KERNEL); | |
232 | if (ret < 0) | |
233 | return ret; | |
234 | } | |
235 | ||
236 | *out = ret; | |
237 | return 0; | |
238 | } | |
239 | ||
e2efd130 | 240 | static struct i915_gem_context * |
0eea67eb | 241 | __create_hw_context(struct drm_device *dev, |
ee960be7 | 242 | struct drm_i915_file_private *file_priv) |
40521054 BW |
243 | { |
244 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e2efd130 | 245 | struct i915_gem_context *ctx; |
c8c470af | 246 | int ret; |
40521054 | 247 | |
f94982b0 | 248 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
146937e5 BW |
249 | if (ctx == NULL) |
250 | return ERR_PTR(-ENOMEM); | |
40521054 | 251 | |
5d1808ec CW |
252 | ret = assign_hw_id(dev_priv, &ctx->hw_id); |
253 | if (ret) { | |
254 | kfree(ctx); | |
255 | return ERR_PTR(ret); | |
256 | } | |
257 | ||
dce3271b | 258 | kref_init(&ctx->ref); |
691e6415 | 259 | list_add_tail(&ctx->link, &dev_priv->context_list); |
9ea4feec | 260 | ctx->i915 = dev_priv; |
40521054 | 261 | |
691e6415 | 262 | if (dev_priv->hw_context_size) { |
aa0c13da OM |
263 | struct drm_i915_gem_object *obj = |
264 | i915_gem_alloc_context_obj(dev, dev_priv->hw_context_size); | |
265 | if (IS_ERR(obj)) { | |
266 | ret = PTR_ERR(obj); | |
4615d4c9 | 267 | goto err_out; |
691e6415 | 268 | } |
ea0c76f8 | 269 | ctx->legacy_hw_ctx.rcs_state = obj; |
691e6415 | 270 | } |
40521054 BW |
271 | |
272 | /* Default context will never have a file_priv */ | |
691e6415 CW |
273 | if (file_priv != NULL) { |
274 | ret = idr_alloc(&file_priv->context_idr, ctx, | |
821d66dd | 275 | DEFAULT_CONTEXT_HANDLE, 0, GFP_KERNEL); |
691e6415 CW |
276 | if (ret < 0) |
277 | goto err_out; | |
278 | } else | |
821d66dd | 279 | ret = DEFAULT_CONTEXT_HANDLE; |
dce3271b MK |
280 | |
281 | ctx->file_priv = file_priv; | |
821d66dd | 282 | ctx->user_handle = ret; |
3ccfd19d BW |
283 | /* NB: Mark all slices as needing a remap so that when the context first |
284 | * loads it will restore whatever remap state already exists. If there | |
285 | * is no remap info, it will be a NOP. */ | |
b2e862d0 | 286 | ctx->remap_slice = ALL_L3_SLICES(dev_priv); |
40521054 | 287 | |
676fa572 CW |
288 | ctx->hang_stats.ban_period_seconds = DRM_I915_CTX_BAN_PERIOD; |
289 | ||
146937e5 | 290 | return ctx; |
40521054 BW |
291 | |
292 | err_out: | |
dce3271b | 293 | i915_gem_context_unreference(ctx); |
146937e5 | 294 | return ERR_PTR(ret); |
40521054 BW |
295 | } |
296 | ||
254f965c BW |
297 | /** |
298 | * The default context needs to exist per ring that uses contexts. It stores the | |
299 | * context state of the GPU for applications that don't utilize HW contexts, as | |
300 | * well as an idle case. | |
301 | */ | |
e2efd130 | 302 | static struct i915_gem_context * |
0eea67eb | 303 | i915_gem_create_context(struct drm_device *dev, |
d624d86e | 304 | struct drm_i915_file_private *file_priv) |
254f965c | 305 | { |
42c3b603 | 306 | const bool is_global_default_ctx = file_priv == NULL; |
e2efd130 | 307 | struct i915_gem_context *ctx; |
bdf4fd7e | 308 | int ret = 0; |
40521054 | 309 | |
499f2697 | 310 | lockdep_assert_held(&dev->struct_mutex); |
40521054 | 311 | |
0eea67eb | 312 | ctx = __create_hw_context(dev, file_priv); |
146937e5 | 313 | if (IS_ERR(ctx)) |
a45d0f6a | 314 | return ctx; |
40521054 | 315 | |
ea0c76f8 | 316 | if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state) { |
42c3b603 CW |
317 | /* We may need to do things with the shrinker which |
318 | * require us to immediately switch back to the default | |
319 | * context. This can cause a problem as pinning the | |
320 | * default context also requires GTT space which may not | |
321 | * be available. To avoid this we always pin the default | |
322 | * context. | |
323 | */ | |
ea0c76f8 | 324 | ret = i915_gem_obj_ggtt_pin(ctx->legacy_hw_ctx.rcs_state, |
c033666a | 325 | get_context_alignment(to_i915(dev)), 0); |
42c3b603 CW |
326 | if (ret) { |
327 | DRM_DEBUG_DRIVER("Couldn't pin %d\n", ret); | |
328 | goto err_destroy; | |
329 | } | |
330 | } | |
331 | ||
d624d86e | 332 | if (USES_FULL_PPGTT(dev)) { |
4d884705 | 333 | struct i915_hw_ppgtt *ppgtt = i915_ppgtt_create(dev, file_priv); |
bdf4fd7e BW |
334 | |
335 | if (IS_ERR_OR_NULL(ppgtt)) { | |
0eea67eb BW |
336 | DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n", |
337 | PTR_ERR(ppgtt)); | |
bdf4fd7e | 338 | ret = PTR_ERR(ppgtt); |
42c3b603 | 339 | goto err_unpin; |
ae6c4806 DV |
340 | } |
341 | ||
342 | ctx->ppgtt = ppgtt; | |
343 | } | |
bdf4fd7e | 344 | |
198c974d DCS |
345 | trace_i915_context_create(ctx); |
346 | ||
a45d0f6a | 347 | return ctx; |
9a3b5304 | 348 | |
42c3b603 | 349 | err_unpin: |
ea0c76f8 OM |
350 | if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state) |
351 | i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state); | |
9a3b5304 | 352 | err_destroy: |
37876df6 | 353 | idr_remove(&file_priv->context_idr, ctx->user_handle); |
dce3271b | 354 | i915_gem_context_unreference(ctx); |
a45d0f6a | 355 | return ERR_PTR(ret); |
254f965c BW |
356 | } |
357 | ||
e2efd130 | 358 | static void i915_gem_context_unpin(struct i915_gem_context *ctx, |
a0b4a6a8 TU |
359 | struct intel_engine_cs *engine) |
360 | { | |
f4e2dece TU |
361 | if (i915.enable_execlists) { |
362 | intel_lr_context_unpin(ctx, engine); | |
363 | } else { | |
364 | if (engine->id == RCS && ctx->legacy_hw_ctx.rcs_state) | |
365 | i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state); | |
366 | i915_gem_context_unreference(ctx); | |
367 | } | |
a0b4a6a8 TU |
368 | } |
369 | ||
acce9ffa BW |
370 | void i915_gem_context_reset(struct drm_device *dev) |
371 | { | |
372 | struct drm_i915_private *dev_priv = dev->dev_private; | |
acce9ffa | 373 | |
499f2697 CW |
374 | lockdep_assert_held(&dev->struct_mutex); |
375 | ||
3e5b6f05 | 376 | if (i915.enable_execlists) { |
e2efd130 | 377 | struct i915_gem_context *ctx; |
3e5b6f05 | 378 | |
a0b4a6a8 | 379 | list_for_each_entry(ctx, &dev_priv->context_list, link) |
7d774cac | 380 | intel_lr_context_reset(dev_priv, ctx); |
3e5b6f05 | 381 | } |
ecdb5fd8 | 382 | |
b2e862d0 | 383 | i915_gem_context_lost(dev_priv); |
acce9ffa BW |
384 | } |
385 | ||
8245be31 | 386 | int i915_gem_context_init(struct drm_device *dev) |
254f965c BW |
387 | { |
388 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e2efd130 | 389 | struct i915_gem_context *ctx; |
254f965c | 390 | |
2fa48d8d BW |
391 | /* Init should only be called once per module load. Eventually the |
392 | * restriction on the context_disabled check can be loosened. */ | |
ed54c1a1 | 393 | if (WARN_ON(dev_priv->kernel_context)) |
8245be31 | 394 | return 0; |
254f965c | 395 | |
c033666a CW |
396 | if (intel_vgpu_active(dev_priv) && |
397 | HAS_LOGICAL_RING_CONTEXTS(dev_priv)) { | |
a0bd6c31 ZL |
398 | if (!i915.enable_execlists) { |
399 | DRM_INFO("Only EXECLIST mode is supported in vgpu.\n"); | |
400 | return -EINVAL; | |
401 | } | |
402 | } | |
403 | ||
5d1808ec CW |
404 | /* Using the simple ida interface, the max is limited by sizeof(int) */ |
405 | BUILD_BUG_ON(MAX_CONTEXT_HW_ID > INT_MAX); | |
406 | ida_init(&dev_priv->context_hw_ida); | |
407 | ||
ede7d42b OM |
408 | if (i915.enable_execlists) { |
409 | /* NB: intentionally left blank. We will allocate our own | |
410 | * backing objects as we need them, thank you very much */ | |
411 | dev_priv->hw_context_size = 0; | |
c033666a CW |
412 | } else if (HAS_HW_CONTEXTS(dev_priv)) { |
413 | dev_priv->hw_context_size = | |
414 | round_up(get_context_size(dev_priv), 4096); | |
691e6415 CW |
415 | if (dev_priv->hw_context_size > (1<<20)) { |
416 | DRM_DEBUG_DRIVER("Disabling HW Contexts; invalid size %d\n", | |
417 | dev_priv->hw_context_size); | |
418 | dev_priv->hw_context_size = 0; | |
419 | } | |
254f965c BW |
420 | } |
421 | ||
d624d86e | 422 | ctx = i915_gem_create_context(dev, NULL); |
691e6415 CW |
423 | if (IS_ERR(ctx)) { |
424 | DRM_ERROR("Failed to create default global context (error %ld)\n", | |
425 | PTR_ERR(ctx)); | |
426 | return PTR_ERR(ctx); | |
254f965c BW |
427 | } |
428 | ||
ed54c1a1 | 429 | dev_priv->kernel_context = ctx; |
67e3d297 | 430 | |
ede7d42b OM |
431 | DRM_DEBUG_DRIVER("%s context support initialized\n", |
432 | i915.enable_execlists ? "LR" : | |
433 | dev_priv->hw_context_size ? "HW" : "fake"); | |
8245be31 | 434 | return 0; |
254f965c BW |
435 | } |
436 | ||
b2e862d0 CW |
437 | void i915_gem_context_lost(struct drm_i915_private *dev_priv) |
438 | { | |
439 | struct intel_engine_cs *engine; | |
440 | ||
499f2697 CW |
441 | lockdep_assert_held(&dev_priv->dev->struct_mutex); |
442 | ||
b2e862d0 CW |
443 | for_each_engine(engine, dev_priv) { |
444 | if (engine->last_context == NULL) | |
445 | continue; | |
446 | ||
447 | i915_gem_context_unpin(engine->last_context, engine); | |
448 | engine->last_context = NULL; | |
449 | } | |
450 | ||
451 | /* Force the GPU state to be reinitialised on enabling */ | |
452 | dev_priv->kernel_context->legacy_hw_ctx.initialized = false; | |
453 | dev_priv->kernel_context->remap_slice = ALL_L3_SLICES(dev_priv); | |
454 | } | |
455 | ||
254f965c BW |
456 | void i915_gem_context_fini(struct drm_device *dev) |
457 | { | |
458 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e2efd130 | 459 | struct i915_gem_context *dctx = dev_priv->kernel_context; |
b2e862d0 | 460 | |
499f2697 CW |
461 | lockdep_assert_held(&dev->struct_mutex); |
462 | ||
e7ae86ba | 463 | if (dctx->legacy_hw_ctx.rcs_state) |
ea0c76f8 | 464 | i915_gem_object_ggtt_unpin(dctx->legacy_hw_ctx.rcs_state); |
67e3d297 | 465 | |
dce3271b | 466 | i915_gem_context_unreference(dctx); |
ed54c1a1 | 467 | dev_priv->kernel_context = NULL; |
5d1808ec CW |
468 | |
469 | ida_destroy(&dev_priv->context_hw_ida); | |
254f965c BW |
470 | } |
471 | ||
40521054 BW |
472 | static int context_idr_cleanup(int id, void *p, void *data) |
473 | { | |
e2efd130 | 474 | struct i915_gem_context *ctx = p; |
40521054 | 475 | |
dce3271b | 476 | i915_gem_context_unreference(ctx); |
40521054 | 477 | return 0; |
254f965c BW |
478 | } |
479 | ||
e422b888 BW |
480 | int i915_gem_context_open(struct drm_device *dev, struct drm_file *file) |
481 | { | |
482 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
e2efd130 | 483 | struct i915_gem_context *ctx; |
e422b888 BW |
484 | |
485 | idr_init(&file_priv->context_idr); | |
486 | ||
0eea67eb | 487 | mutex_lock(&dev->struct_mutex); |
d624d86e | 488 | ctx = i915_gem_create_context(dev, file_priv); |
0eea67eb BW |
489 | mutex_unlock(&dev->struct_mutex); |
490 | ||
f83d6518 | 491 | if (IS_ERR(ctx)) { |
0eea67eb | 492 | idr_destroy(&file_priv->context_idr); |
f83d6518 | 493 | return PTR_ERR(ctx); |
0eea67eb BW |
494 | } |
495 | ||
e422b888 BW |
496 | return 0; |
497 | } | |
498 | ||
254f965c BW |
499 | void i915_gem_context_close(struct drm_device *dev, struct drm_file *file) |
500 | { | |
40521054 | 501 | struct drm_i915_file_private *file_priv = file->driver_priv; |
254f965c | 502 | |
499f2697 CW |
503 | lockdep_assert_held(&dev->struct_mutex); |
504 | ||
73c273eb | 505 | idr_for_each(&file_priv->context_idr, context_idr_cleanup, NULL); |
40521054 | 506 | idr_destroy(&file_priv->context_idr); |
40521054 BW |
507 | } |
508 | ||
e2efd130 | 509 | struct i915_gem_context * |
40521054 BW |
510 | i915_gem_context_get(struct drm_i915_file_private *file_priv, u32 id) |
511 | { | |
e2efd130 | 512 | struct i915_gem_context *ctx; |
72ad5c45 | 513 | |
499f2697 CW |
514 | lockdep_assert_held(&file_priv->dev_priv->dev->struct_mutex); |
515 | ||
e2efd130 | 516 | ctx = idr_find(&file_priv->context_idr, id); |
72ad5c45 BW |
517 | if (!ctx) |
518 | return ERR_PTR(-ENOENT); | |
519 | ||
520 | return ctx; | |
254f965c | 521 | } |
e0556841 BW |
522 | |
523 | static inline int | |
1d719cda | 524 | mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags) |
e0556841 | 525 | { |
c033666a | 526 | struct drm_i915_private *dev_priv = req->i915; |
4a570db5 | 527 | struct intel_engine_cs *engine = req->engine; |
e80f14b6 | 528 | u32 flags = hw_flags | MI_MM_SPACE_GTT; |
2c550183 CW |
529 | const int num_rings = |
530 | /* Use an extended w/a on ivb+ if signalling from other rings */ | |
c033666a CW |
531 | i915_semaphore_is_enabled(dev_priv) ? |
532 | hweight32(INTEL_INFO(dev_priv)->ring_mask) - 1 : | |
2c550183 | 533 | 0; |
b4ac5afc | 534 | int len, ret; |
e0556841 | 535 | |
12b0286f BW |
536 | /* w/a: If Flush TLB Invalidation Mode is enabled, driver must do a TLB |
537 | * invalidation prior to MI_SET_CONTEXT. On GEN6 we don't set the value | |
538 | * explicitly, so we rely on the value at ring init, stored in | |
539 | * itlb_before_ctx_switch. | |
540 | */ | |
c033666a | 541 | if (IS_GEN6(dev_priv)) { |
e2f80391 | 542 | ret = engine->flush(req, I915_GEM_GPU_DOMAINS, 0); |
12b0286f BW |
543 | if (ret) |
544 | return ret; | |
545 | } | |
546 | ||
e80f14b6 | 547 | /* These flags are for resource streamer on HSW+ */ |
c033666a | 548 | if (IS_HASWELL(dev_priv) || INTEL_GEN(dev_priv) >= 8) |
4c436d55 | 549 | flags |= (HSW_MI_RS_SAVE_STATE_EN | HSW_MI_RS_RESTORE_STATE_EN); |
c033666a | 550 | else if (INTEL_GEN(dev_priv) < 8) |
e80f14b6 BW |
551 | flags |= (MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN); |
552 | ||
2c550183 CW |
553 | |
554 | len = 4; | |
c033666a | 555 | if (INTEL_GEN(dev_priv) >= 7) |
e9135c4f | 556 | len += 2 + (num_rings ? 4*num_rings + 6 : 0); |
2c550183 | 557 | |
5fb9de1a | 558 | ret = intel_ring_begin(req, len); |
e0556841 BW |
559 | if (ret) |
560 | return ret; | |
561 | ||
b3f797ac | 562 | /* WaProgramMiArbOnOffAroundMiSetContext:ivb,vlv,hsw,bdw,chv */ |
c033666a | 563 | if (INTEL_GEN(dev_priv) >= 7) { |
e2f80391 | 564 | intel_ring_emit(engine, MI_ARB_ON_OFF | MI_ARB_DISABLE); |
2c550183 CW |
565 | if (num_rings) { |
566 | struct intel_engine_cs *signaller; | |
567 | ||
e2f80391 TU |
568 | intel_ring_emit(engine, |
569 | MI_LOAD_REGISTER_IMM(num_rings)); | |
c033666a | 570 | for_each_engine(signaller, dev_priv) { |
e2f80391 | 571 | if (signaller == engine) |
2c550183 CW |
572 | continue; |
573 | ||
e2f80391 TU |
574 | intel_ring_emit_reg(engine, |
575 | RING_PSMI_CTL(signaller->mmio_base)); | |
576 | intel_ring_emit(engine, | |
577 | _MASKED_BIT_ENABLE(GEN6_PSMI_SLEEP_MSG_DISABLE)); | |
2c550183 CW |
578 | } |
579 | } | |
580 | } | |
e37ec39b | 581 | |
e2f80391 TU |
582 | intel_ring_emit(engine, MI_NOOP); |
583 | intel_ring_emit(engine, MI_SET_CONTEXT); | |
584 | intel_ring_emit(engine, | |
585 | i915_gem_obj_ggtt_offset(req->ctx->legacy_hw_ctx.rcs_state) | | |
e80f14b6 | 586 | flags); |
2b7e8082 VS |
587 | /* |
588 | * w/a: MI_SET_CONTEXT must always be followed by MI_NOOP | |
589 | * WaMiSetContext_Hang:snb,ivb,vlv | |
590 | */ | |
e2f80391 | 591 | intel_ring_emit(engine, MI_NOOP); |
e0556841 | 592 | |
c033666a | 593 | if (INTEL_GEN(dev_priv) >= 7) { |
2c550183 CW |
594 | if (num_rings) { |
595 | struct intel_engine_cs *signaller; | |
e9135c4f | 596 | i915_reg_t last_reg = {}; /* keep gcc quiet */ |
2c550183 | 597 | |
e2f80391 TU |
598 | intel_ring_emit(engine, |
599 | MI_LOAD_REGISTER_IMM(num_rings)); | |
c033666a | 600 | for_each_engine(signaller, dev_priv) { |
e2f80391 | 601 | if (signaller == engine) |
2c550183 CW |
602 | continue; |
603 | ||
e9135c4f CW |
604 | last_reg = RING_PSMI_CTL(signaller->mmio_base); |
605 | intel_ring_emit_reg(engine, last_reg); | |
e2f80391 TU |
606 | intel_ring_emit(engine, |
607 | _MASKED_BIT_DISABLE(GEN6_PSMI_SLEEP_MSG_DISABLE)); | |
2c550183 | 608 | } |
e9135c4f CW |
609 | |
610 | /* Insert a delay before the next switch! */ | |
611 | intel_ring_emit(engine, | |
612 | MI_STORE_REGISTER_MEM | | |
613 | MI_SRM_LRM_GLOBAL_GTT); | |
614 | intel_ring_emit_reg(engine, last_reg); | |
615 | intel_ring_emit(engine, engine->scratch.gtt_offset); | |
616 | intel_ring_emit(engine, MI_NOOP); | |
2c550183 | 617 | } |
e2f80391 | 618 | intel_ring_emit(engine, MI_ARB_ON_OFF | MI_ARB_ENABLE); |
2c550183 | 619 | } |
e37ec39b | 620 | |
e2f80391 | 621 | intel_ring_advance(engine); |
e0556841 BW |
622 | |
623 | return ret; | |
624 | } | |
625 | ||
d200cda6 | 626 | static int remap_l3(struct drm_i915_gem_request *req, int slice) |
b0ebde39 | 627 | { |
ff55b5e8 | 628 | u32 *remap_info = req->i915->l3_parity.remap_info[slice]; |
b0ebde39 | 629 | struct intel_engine_cs *engine = req->engine; |
b0ebde39 CW |
630 | int i, ret; |
631 | ||
ff55b5e8 | 632 | if (!remap_info) |
b0ebde39 CW |
633 | return 0; |
634 | ||
ff55b5e8 | 635 | ret = intel_ring_begin(req, GEN7_L3LOG_SIZE/4 * 2 + 2); |
b0ebde39 CW |
636 | if (ret) |
637 | return ret; | |
638 | ||
639 | /* | |
640 | * Note: We do not worry about the concurrent register cacheline hang | |
641 | * here because no other code should access these registers other than | |
642 | * at initialization time. | |
643 | */ | |
ff55b5e8 CW |
644 | intel_ring_emit(engine, MI_LOAD_REGISTER_IMM(GEN7_L3LOG_SIZE/4)); |
645 | for (i = 0; i < GEN7_L3LOG_SIZE/4; i++) { | |
b0ebde39 CW |
646 | intel_ring_emit_reg(engine, GEN7_L3LOG(slice, i)); |
647 | intel_ring_emit(engine, remap_info[i]); | |
648 | } | |
ff55b5e8 | 649 | intel_ring_emit(engine, MI_NOOP); |
b0ebde39 CW |
650 | intel_ring_advance(engine); |
651 | ||
ff55b5e8 | 652 | return 0; |
b0ebde39 CW |
653 | } |
654 | ||
f9326be5 CW |
655 | static inline bool skip_rcs_switch(struct i915_hw_ppgtt *ppgtt, |
656 | struct intel_engine_cs *engine, | |
e2efd130 | 657 | struct i915_gem_context *to) |
317b4e90 | 658 | { |
563222a7 BW |
659 | if (to->remap_slice) |
660 | return false; | |
661 | ||
fcb5106d CW |
662 | if (!to->legacy_hw_ctx.initialized) |
663 | return false; | |
664 | ||
f9326be5 | 665 | if (ppgtt && (intel_engine_flag(engine) & ppgtt->pd_dirty_rings)) |
fcb5106d | 666 | return false; |
317b4e90 | 667 | |
fcb5106d | 668 | return to == engine->last_context; |
317b4e90 BW |
669 | } |
670 | ||
671 | static bool | |
f9326be5 CW |
672 | needs_pd_load_pre(struct i915_hw_ppgtt *ppgtt, |
673 | struct intel_engine_cs *engine, | |
e2efd130 | 674 | struct i915_gem_context *to) |
317b4e90 | 675 | { |
f9326be5 | 676 | if (!ppgtt) |
317b4e90 BW |
677 | return false; |
678 | ||
f9326be5 CW |
679 | /* Always load the ppgtt on first use */ |
680 | if (!engine->last_context) | |
681 | return true; | |
682 | ||
683 | /* Same context without new entries, skip */ | |
e1a8daa2 | 684 | if (engine->last_context == to && |
f9326be5 | 685 | !(intel_engine_flag(engine) & ppgtt->pd_dirty_rings)) |
e1a8daa2 CW |
686 | return false; |
687 | ||
688 | if (engine->id != RCS) | |
317b4e90 BW |
689 | return true; |
690 | ||
c033666a | 691 | if (INTEL_GEN(engine->i915) < 8) |
317b4e90 BW |
692 | return true; |
693 | ||
694 | return false; | |
695 | } | |
696 | ||
697 | static bool | |
f9326be5 | 698 | needs_pd_load_post(struct i915_hw_ppgtt *ppgtt, |
e2efd130 | 699 | struct i915_gem_context *to, |
f9326be5 | 700 | u32 hw_flags) |
317b4e90 | 701 | { |
f9326be5 | 702 | if (!ppgtt) |
317b4e90 BW |
703 | return false; |
704 | ||
fcb5106d | 705 | if (!IS_GEN8(to->i915)) |
317b4e90 BW |
706 | return false; |
707 | ||
6702cf16 | 708 | if (hw_flags & MI_RESTORE_INHIBIT) |
317b4e90 BW |
709 | return true; |
710 | ||
711 | return false; | |
712 | } | |
713 | ||
e1a8daa2 | 714 | static int do_rcs_switch(struct drm_i915_gem_request *req) |
e0556841 | 715 | { |
e2efd130 | 716 | struct i915_gem_context *to = req->ctx; |
4a570db5 | 717 | struct intel_engine_cs *engine = req->engine; |
f9326be5 | 718 | struct i915_hw_ppgtt *ppgtt = to->ppgtt ?: req->i915->mm.aliasing_ppgtt; |
e2efd130 | 719 | struct i915_gem_context *from; |
fcb5106d | 720 | u32 hw_flags; |
3ccfd19d | 721 | int ret, i; |
e0556841 | 722 | |
f9326be5 | 723 | if (skip_rcs_switch(ppgtt, engine, to)) |
9a3b5304 CW |
724 | return 0; |
725 | ||
7e0d96bc | 726 | /* Trying to pin first makes error handling easier. */ |
e1a8daa2 | 727 | ret = i915_gem_obj_ggtt_pin(to->legacy_hw_ctx.rcs_state, |
c033666a | 728 | get_context_alignment(engine->i915), |
e1a8daa2 CW |
729 | 0); |
730 | if (ret) | |
731 | return ret; | |
67e3d297 | 732 | |
acc240d4 DV |
733 | /* |
734 | * Pin can switch back to the default context if we end up calling into | |
735 | * evict_everything - as a last ditch gtt defrag effort that also | |
736 | * switches to the default context. Hence we need to reload from here. | |
fcb5106d CW |
737 | * |
738 | * XXX: Doing so is painfully broken! | |
acc240d4 | 739 | */ |
e2f80391 | 740 | from = engine->last_context; |
acc240d4 DV |
741 | |
742 | /* | |
743 | * Clear this page out of any CPU caches for coherent swap-in/out. Note | |
d3373a24 CW |
744 | * that thanks to write = false in this call and us not setting any gpu |
745 | * write domains when putting a context object onto the active list | |
746 | * (when switching away from it), this won't block. | |
acc240d4 DV |
747 | * |
748 | * XXX: We need a real interface to do this instead of trickery. | |
749 | */ | |
ea0c76f8 | 750 | ret = i915_gem_object_set_to_gtt_domain(to->legacy_hw_ctx.rcs_state, false); |
7e0d96bc BW |
751 | if (ret) |
752 | goto unpin_out; | |
d3373a24 | 753 | |
f9326be5 | 754 | if (needs_pd_load_pre(ppgtt, engine, to)) { |
fcb5106d CW |
755 | /* Older GENs and non render rings still want the load first, |
756 | * "PP_DCLV followed by PP_DIR_BASE register through Load | |
757 | * Register Immediate commands in Ring Buffer before submitting | |
758 | * a context."*/ | |
759 | trace_switch_mm(engine, to); | |
f9326be5 | 760 | ret = ppgtt->switch_mm(ppgtt, req); |
fcb5106d CW |
761 | if (ret) |
762 | goto unpin_out; | |
763 | } | |
764 | ||
765 | if (!to->legacy_hw_ctx.initialized || i915_gem_context_is_default(to)) | |
6702cf16 BW |
766 | /* NB: If we inhibit the restore, the context is not allowed to |
767 | * die because future work may end up depending on valid address | |
768 | * space. This means we must enforce that a page table load | |
769 | * occur when this occurs. */ | |
fcb5106d | 770 | hw_flags = MI_RESTORE_INHIBIT; |
f9326be5 | 771 | else if (ppgtt && intel_engine_flag(engine) & ppgtt->pd_dirty_rings) |
fcb5106d CW |
772 | hw_flags = MI_FORCE_RESTORE; |
773 | else | |
774 | hw_flags = 0; | |
e0556841 | 775 | |
fcb5106d CW |
776 | if (to != from || (hw_flags & MI_FORCE_RESTORE)) { |
777 | ret = mi_set_context(req, hw_flags); | |
3ccfd19d | 778 | if (ret) |
fcb5106d | 779 | goto unpin_out; |
3ccfd19d BW |
780 | } |
781 | ||
e0556841 BW |
782 | /* The backing object for the context is done after switching to the |
783 | * *next* context. Therefore we cannot retire the previous context until | |
784 | * the next context has already started running. In fact, the below code | |
785 | * is a bit suboptimal because the retiring can occur simply after the | |
786 | * MI_SET_CONTEXT instead of when the next seqno has completed. | |
787 | */ | |
112522f6 | 788 | if (from != NULL) { |
ea0c76f8 | 789 | from->legacy_hw_ctx.rcs_state->base.read_domains = I915_GEM_DOMAIN_INSTRUCTION; |
b2af0376 | 790 | i915_vma_move_to_active(i915_gem_obj_to_ggtt(from->legacy_hw_ctx.rcs_state), req); |
e0556841 BW |
791 | /* As long as MI_SET_CONTEXT is serializing, ie. it flushes the |
792 | * whole damn pipeline, we don't need to explicitly mark the | |
793 | * object dirty. The only exception is that the context must be | |
794 | * correct in case the object gets swapped out. Ideally we'd be | |
795 | * able to defer doing this until we know the object would be | |
796 | * swapped, but there is no way to do that yet. | |
797 | */ | |
ea0c76f8 | 798 | from->legacy_hw_ctx.rcs_state->dirty = 1; |
112522f6 | 799 | |
c0321e2c | 800 | /* obj is kept alive until the next request by its active ref */ |
ea0c76f8 | 801 | i915_gem_object_ggtt_unpin(from->legacy_hw_ctx.rcs_state); |
112522f6 | 802 | i915_gem_context_unreference(from); |
e0556841 | 803 | } |
112522f6 | 804 | i915_gem_context_reference(to); |
e2f80391 | 805 | engine->last_context = to; |
e0556841 | 806 | |
fcb5106d CW |
807 | /* GEN8 does *not* require an explicit reload if the PDPs have been |
808 | * setup, and we do not wish to move them. | |
809 | */ | |
f9326be5 | 810 | if (needs_pd_load_post(ppgtt, to, hw_flags)) { |
fcb5106d | 811 | trace_switch_mm(engine, to); |
f9326be5 | 812 | ret = ppgtt->switch_mm(ppgtt, req); |
fcb5106d CW |
813 | /* The hardware context switch is emitted, but we haven't |
814 | * actually changed the state - so it's probably safe to bail | |
815 | * here. Still, let the user know something dangerous has | |
816 | * happened. | |
817 | */ | |
818 | if (ret) | |
819 | return ret; | |
820 | } | |
821 | ||
f9326be5 CW |
822 | if (ppgtt) |
823 | ppgtt->pd_dirty_rings &= ~intel_engine_flag(engine); | |
fcb5106d CW |
824 | |
825 | for (i = 0; i < MAX_L3_SLICES; i++) { | |
826 | if (!(to->remap_slice & (1<<i))) | |
827 | continue; | |
828 | ||
d200cda6 | 829 | ret = remap_l3(req, i); |
fcb5106d CW |
830 | if (ret) |
831 | return ret; | |
832 | ||
833 | to->remap_slice &= ~(1<<i); | |
834 | } | |
835 | ||
836 | if (!to->legacy_hw_ctx.initialized) { | |
e2f80391 TU |
837 | if (engine->init_context) { |
838 | ret = engine->init_context(req); | |
86d7f238 | 839 | if (ret) |
fcb5106d | 840 | return ret; |
86d7f238 | 841 | } |
fcb5106d | 842 | to->legacy_hw_ctx.initialized = true; |
46470fc9 MK |
843 | } |
844 | ||
e0556841 | 845 | return 0; |
7e0d96bc BW |
846 | |
847 | unpin_out: | |
e1a8daa2 | 848 | i915_gem_object_ggtt_unpin(to->legacy_hw_ctx.rcs_state); |
7e0d96bc | 849 | return ret; |
e0556841 BW |
850 | } |
851 | ||
852 | /** | |
853 | * i915_switch_context() - perform a GPU context switch. | |
ba01cc93 | 854 | * @req: request for which we'll execute the context switch |
e0556841 BW |
855 | * |
856 | * The context life cycle is simple. The context refcount is incremented and | |
857 | * decremented by 1 and create and destroy. If the context is in use by the GPU, | |
ecdb5fd8 | 858 | * it will have a refcount > 1. This allows us to destroy the context abstract |
e0556841 | 859 | * object while letting the normal object tracking destroy the backing BO. |
ecdb5fd8 TD |
860 | * |
861 | * This function should not be used in execlists mode. Instead the context is | |
862 | * switched by writing to the ELSP and requests keep a reference to their | |
863 | * context. | |
e0556841 | 864 | */ |
ba01cc93 | 865 | int i915_switch_context(struct drm_i915_gem_request *req) |
e0556841 | 866 | { |
4a570db5 | 867 | struct intel_engine_cs *engine = req->engine; |
e0556841 | 868 | |
ecdb5fd8 | 869 | WARN_ON(i915.enable_execlists); |
499f2697 | 870 | lockdep_assert_held(&req->i915->dev->struct_mutex); |
0eea67eb | 871 | |
e1a8daa2 CW |
872 | if (engine->id != RCS || |
873 | req->ctx->legacy_hw_ctx.rcs_state == NULL) { | |
e2efd130 | 874 | struct i915_gem_context *to = req->ctx; |
f9326be5 CW |
875 | struct i915_hw_ppgtt *ppgtt = |
876 | to->ppgtt ?: req->i915->mm.aliasing_ppgtt; | |
e1a8daa2 | 877 | |
f9326be5 | 878 | if (needs_pd_load_pre(ppgtt, engine, to)) { |
e1a8daa2 CW |
879 | int ret; |
880 | ||
881 | trace_switch_mm(engine, to); | |
f9326be5 | 882 | ret = ppgtt->switch_mm(ppgtt, req); |
e1a8daa2 CW |
883 | if (ret) |
884 | return ret; | |
885 | ||
f9326be5 | 886 | ppgtt->pd_dirty_rings &= ~intel_engine_flag(engine); |
e1a8daa2 CW |
887 | } |
888 | ||
889 | if (to != engine->last_context) { | |
890 | i915_gem_context_reference(to); | |
e2f80391 TU |
891 | if (engine->last_context) |
892 | i915_gem_context_unreference(engine->last_context); | |
e1a8daa2 | 893 | engine->last_context = to; |
691e6415 | 894 | } |
e1a8daa2 | 895 | |
c482972a | 896 | return 0; |
a95f6a00 | 897 | } |
c482972a | 898 | |
e1a8daa2 | 899 | return do_rcs_switch(req); |
e0556841 | 900 | } |
84624813 | 901 | |
ec3e9963 | 902 | static bool contexts_enabled(struct drm_device *dev) |
691e6415 | 903 | { |
ec3e9963 | 904 | return i915.enable_execlists || to_i915(dev)->hw_context_size; |
691e6415 CW |
905 | } |
906 | ||
84624813 BW |
907 | int i915_gem_context_create_ioctl(struct drm_device *dev, void *data, |
908 | struct drm_file *file) | |
909 | { | |
84624813 BW |
910 | struct drm_i915_gem_context_create *args = data; |
911 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
e2efd130 | 912 | struct i915_gem_context *ctx; |
84624813 BW |
913 | int ret; |
914 | ||
ec3e9963 | 915 | if (!contexts_enabled(dev)) |
5fa8be65 DV |
916 | return -ENODEV; |
917 | ||
b31e5136 CW |
918 | if (args->pad != 0) |
919 | return -EINVAL; | |
920 | ||
84624813 BW |
921 | ret = i915_mutex_lock_interruptible(dev); |
922 | if (ret) | |
923 | return ret; | |
924 | ||
d624d86e | 925 | ctx = i915_gem_create_context(dev, file_priv); |
84624813 | 926 | mutex_unlock(&dev->struct_mutex); |
be636387 DC |
927 | if (IS_ERR(ctx)) |
928 | return PTR_ERR(ctx); | |
84624813 | 929 | |
821d66dd | 930 | args->ctx_id = ctx->user_handle; |
84624813 BW |
931 | DRM_DEBUG_DRIVER("HW context %d created\n", args->ctx_id); |
932 | ||
be636387 | 933 | return 0; |
84624813 BW |
934 | } |
935 | ||
936 | int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data, | |
937 | struct drm_file *file) | |
938 | { | |
939 | struct drm_i915_gem_context_destroy *args = data; | |
940 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
e2efd130 | 941 | struct i915_gem_context *ctx; |
84624813 BW |
942 | int ret; |
943 | ||
b31e5136 CW |
944 | if (args->pad != 0) |
945 | return -EINVAL; | |
946 | ||
821d66dd | 947 | if (args->ctx_id == DEFAULT_CONTEXT_HANDLE) |
c2cf2416 | 948 | return -ENOENT; |
0eea67eb | 949 | |
84624813 BW |
950 | ret = i915_mutex_lock_interruptible(dev); |
951 | if (ret) | |
952 | return ret; | |
953 | ||
954 | ctx = i915_gem_context_get(file_priv, args->ctx_id); | |
72ad5c45 | 955 | if (IS_ERR(ctx)) { |
84624813 | 956 | mutex_unlock(&dev->struct_mutex); |
72ad5c45 | 957 | return PTR_ERR(ctx); |
84624813 BW |
958 | } |
959 | ||
821d66dd | 960 | idr_remove(&ctx->file_priv->context_idr, ctx->user_handle); |
dce3271b | 961 | i915_gem_context_unreference(ctx); |
84624813 BW |
962 | mutex_unlock(&dev->struct_mutex); |
963 | ||
964 | DRM_DEBUG_DRIVER("HW context %d destroyed\n", args->ctx_id); | |
965 | return 0; | |
966 | } | |
c9dc0f35 CW |
967 | |
968 | int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data, | |
969 | struct drm_file *file) | |
970 | { | |
971 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
972 | struct drm_i915_gem_context_param *args = data; | |
e2efd130 | 973 | struct i915_gem_context *ctx; |
c9dc0f35 CW |
974 | int ret; |
975 | ||
976 | ret = i915_mutex_lock_interruptible(dev); | |
977 | if (ret) | |
978 | return ret; | |
979 | ||
980 | ctx = i915_gem_context_get(file_priv, args->ctx_id); | |
981 | if (IS_ERR(ctx)) { | |
982 | mutex_unlock(&dev->struct_mutex); | |
983 | return PTR_ERR(ctx); | |
984 | } | |
985 | ||
986 | args->size = 0; | |
987 | switch (args->param) { | |
988 | case I915_CONTEXT_PARAM_BAN_PERIOD: | |
989 | args->value = ctx->hang_stats.ban_period_seconds; | |
990 | break; | |
b1b38278 DW |
991 | case I915_CONTEXT_PARAM_NO_ZEROMAP: |
992 | args->value = ctx->flags & CONTEXT_NO_ZEROMAP; | |
993 | break; | |
fa8848f2 CW |
994 | case I915_CONTEXT_PARAM_GTT_SIZE: |
995 | if (ctx->ppgtt) | |
996 | args->value = ctx->ppgtt->base.total; | |
997 | else if (to_i915(dev)->mm.aliasing_ppgtt) | |
998 | args->value = to_i915(dev)->mm.aliasing_ppgtt->base.total; | |
999 | else | |
62106b4f | 1000 | args->value = to_i915(dev)->ggtt.base.total; |
fa8848f2 | 1001 | break; |
c9dc0f35 CW |
1002 | default: |
1003 | ret = -EINVAL; | |
1004 | break; | |
1005 | } | |
1006 | mutex_unlock(&dev->struct_mutex); | |
1007 | ||
1008 | return ret; | |
1009 | } | |
1010 | ||
1011 | int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data, | |
1012 | struct drm_file *file) | |
1013 | { | |
1014 | struct drm_i915_file_private *file_priv = file->driver_priv; | |
1015 | struct drm_i915_gem_context_param *args = data; | |
e2efd130 | 1016 | struct i915_gem_context *ctx; |
c9dc0f35 CW |
1017 | int ret; |
1018 | ||
1019 | ret = i915_mutex_lock_interruptible(dev); | |
1020 | if (ret) | |
1021 | return ret; | |
1022 | ||
1023 | ctx = i915_gem_context_get(file_priv, args->ctx_id); | |
1024 | if (IS_ERR(ctx)) { | |
1025 | mutex_unlock(&dev->struct_mutex); | |
1026 | return PTR_ERR(ctx); | |
1027 | } | |
1028 | ||
1029 | switch (args->param) { | |
1030 | case I915_CONTEXT_PARAM_BAN_PERIOD: | |
1031 | if (args->size) | |
1032 | ret = -EINVAL; | |
1033 | else if (args->value < ctx->hang_stats.ban_period_seconds && | |
1034 | !capable(CAP_SYS_ADMIN)) | |
1035 | ret = -EPERM; | |
1036 | else | |
1037 | ctx->hang_stats.ban_period_seconds = args->value; | |
1038 | break; | |
b1b38278 DW |
1039 | case I915_CONTEXT_PARAM_NO_ZEROMAP: |
1040 | if (args->size) { | |
1041 | ret = -EINVAL; | |
1042 | } else { | |
1043 | ctx->flags &= ~CONTEXT_NO_ZEROMAP; | |
1044 | ctx->flags |= args->value ? CONTEXT_NO_ZEROMAP : 0; | |
1045 | } | |
1046 | break; | |
c9dc0f35 CW |
1047 | default: |
1048 | ret = -EINVAL; | |
1049 | break; | |
1050 | } | |
1051 | mutex_unlock(&dev->struct_mutex); | |
1052 | ||
1053 | return ret; | |
1054 | } | |
d538704b CW |
1055 | |
1056 | int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, | |
1057 | void *data, struct drm_file *file) | |
1058 | { | |
1059 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1060 | struct drm_i915_reset_stats *args = data; | |
1061 | struct i915_ctx_hang_stats *hs; | |
e2efd130 | 1062 | struct i915_gem_context *ctx; |
d538704b CW |
1063 | int ret; |
1064 | ||
1065 | if (args->flags || args->pad) | |
1066 | return -EINVAL; | |
1067 | ||
1068 | if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN)) | |
1069 | return -EPERM; | |
1070 | ||
bdb04614 | 1071 | ret = i915_mutex_lock_interruptible(dev); |
d538704b CW |
1072 | if (ret) |
1073 | return ret; | |
1074 | ||
1075 | ctx = i915_gem_context_get(file->driver_priv, args->ctx_id); | |
1076 | if (IS_ERR(ctx)) { | |
1077 | mutex_unlock(&dev->struct_mutex); | |
1078 | return PTR_ERR(ctx); | |
1079 | } | |
1080 | hs = &ctx->hang_stats; | |
1081 | ||
1082 | if (capable(CAP_SYS_ADMIN)) | |
1083 | args->reset_count = i915_reset_count(&dev_priv->gpu_error); | |
1084 | else | |
1085 | args->reset_count = 0; | |
1086 | ||
1087 | args->batch_active = hs->batch_active; | |
1088 | args->batch_pending = hs->batch_pending; | |
1089 | ||
1090 | mutex_unlock(&dev->struct_mutex); | |
1091 | ||
1092 | return 0; | |
1093 | } |